Obtuse marginal artery

Last revised by Dr Daniel J Bell on 06 Jul 2021

The obtuse marginal (OM) arteries sometimes referred to as lateral branches are branch coronary arteries that come off the circumflex artery. There can be one or more obtuse marginal arteries. It typically traverses along the left margin of heart towards the apex. The first obtuse marginal artery (OM1) is usually found on or close to the obtuse margin of the heart and is also known as the “margo obtusus”.

See also

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Cases and figures

  • Case 1: normal coronary angiogram (DSA)
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  • Case 2: normal CTCA
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